Habitats of the World: A Field Guide for Birders, Naturalists, and Ecologists

Campbell, Iain, Ken Behrens, Charley Hesse, and Phil Chaon

The Complete Birds of the World: Every Species Illustrated

Arlott, Norman, Ber van Perlo, Francisco Erize, Jorge Raul Rodriguez Mata, Maurice Rumboll, and Martín R. De la Pena

The Migration Ecology of Birds

Newton, Ian

Illustrations by Brockie, Keith

Parrots: A Guide to Parrots of the World

Juniper, Tony; Parr, Michael

Living Birds of The World

Gilliard, E. Thomas

All the Birds of the World

Josep del Hoyo (Editor)

Illustrated Checklist of the Mammals of the World

Josep del Hoyo and Nigel J. Collar, Chief Authors

The Largest Avian Radiation: The Evolution of Perching Birds, or the Order Passeriformes

Fjeldsa, Jon, Les Christidis, and Per G. P. Ericson, editors

Pelicans, Cormorants, and their Relatives: The Pelecaniformes

NELSON, J. Bryan

Illustrations by MACKAY, Andrew; BUSBY, John

Finches and Sparrows: An Identification Guide

Clement, Peter

A Supplement to Distribution and Taxonomy of Birds of the World

Sibley, Charles G.; Monroe, Burt L. Jr.

Handbook of the Birds of the World, Volumes 1 through 16

DEL HOYO, Josep, Andrew ELLIOTT, and Jordi SARGATAL, Editors; Butchart, Stuart; Collar, Nigel; Stattersfield, Alison; Bennun, Leon